Heat rectification effect of serially coupled quantum dots

Abstract

The nonlinear thermoelectric properties of serially coupled quantum dots (SCQDs) embedded in a nanowire connected to metallic electrodes are theoretically studied in the Coulomb blockade regime. We demonstrate that the electron heat current of SCQDs exhibit a direction-dependent behavior (heat rectification) in an asymmetrical structure in which the electron Coulomb interactions are significant. The phonon thermal conductivity of the nanowire is also calculated, which is used to estimate the phonon heat current. Finally, we discuss how to reduce phonon heat current to allow observation of electron heat rectification behavior in the SCQD junction system in low temperature regime ($\approx 3K$).

9 pages and 6 figures

References in corpus (5)

• Quantum dot as thermal rectifier
• Optimal thermoelectric figure of merit of a molecular junction
• Bipolar spin blockade and coherent state superpositions in a triple quantum dot
• Tunneling current spectroscopy of a nanostructure junction involving multiple energy levels
• Photon- and phonon-assisted tunneling in the three-dimensional charge stability diagram of a triple quantum dot array

Cited by in corpus (5)

• Thermoelectrics with Coulomb coupled quantum dots
• Thermal Gating of Charge Currents with Coulomb Coupled Quantum Dots
• Long distance coherent tunneling effect on the charge and heat currents in serially coupled triple quantum dots
• Superlattice nanowire heat engines with direction-dependent power output and heat current
• Heat rectification by two qubits coupled with Dzyaloshinskii-Moriya interaction